Mario Gotze has returned back to Borussia Dortmund on a four-year contract from Bayern Munich

Borussia Dortmund has signed the German International star in a fee around € 22m according to the sources and which could raise on the bases of his performance with the Dortmund. 

The German international star , who delivered in the finals by scoring the winning goal for his side in the 2014 World Cup Final, had left Dortmund in 2013 for Bayern has now re-united with the club. 
Bayern Munich and Borussia Dortmund have both confirmed the signing of Gotze until 2020

"Three years later, and at 24, I look with different eyes at my decision. I can well understand that many fans could not understand my decision. I would not even take it today.
When I return to my home, I want to try to convince all people by my performances – especially those who do not receive me with open arms – that my aim is to play my best football again. For all of us, the club and the BVB fans."